#include <iostream>

using namespace std;
class A{
	public:
		int get(){return i;}
		void set(int x){this->i/** this.i = x will be error */ = x;}
	private:
		int i;
};

int main(int argc, char *argv[]) {
	A a ;
	A &ra = a ;
	
	ra.set(11);
	cout<<ra.get()<<endl;
	
}